https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86400
Bug ID: 86400
Summary: [8 regression] set<string>::set<char (*)[2])
constructor does not work with array argument
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: [email protected]
Target Milestone: ---
This fails at -O2, but not at -O. The problem appears to be the
basic_string(const char*) constructor miscomputing the arguments for
_M_construct, with traits_type::length(__s) returning 0.
$ cat set.cc
#include <cassert>
#include <string>
#include <set>
void
foo1 ()
{
static char root[2] = {"/"};
std::set<std::string, std::less<std::string>> d (&root, &root + 1);
bool b = d.find ("/") != d.end ();
assert (b);
}
void
foo2 ()
{
static char root[1][2] = {"/"};
std::set<std::string, std::less<std::string>> d (root, root + 1);
bool b = d.find ("/") != d.end ();
assert (b);
}
int
main ()
{
foo1 ();
foo2 ();
}
$ g++ -O2 -g -Wall set.cc -o set
$ ./set
set: set.cc:20: void foo2(): Assertion `b' failed.
